➕ PHP Arithmetic Operators

? Quick Overview

Arithmetic operators are used to perform common mathematical operations on variables and values in PHP.

? Key Concepts

+ Addition
- Subtraction
* Multiplication
/ Division
% Modulus (remainder)
** Exponentiation (power)

? Syntax & Theory

PHP arithmetic operators work on numeric operands. You can combine multiple operators in one expression, and PHP follows standard mathematical precedence rules.

? Live Interactive Demo

Test how variables $a and $b interact!

Addition (+)13

Subtraction (-)7

Multiplication (*)30

Division (/)3.33

Modulus (%)1

Exponent (**)1000

? Code Example

? View Code Example

// Demonstrating all PHP arithmetic operators
<?php
$a = 10;
$b = 3;

echo "Addition: " . ($a + $b) . "<br>";
echo "Subtraction: " . ($a - $b) . "<br>";
echo "Multiplication: " . ($a * $b) . "<br>";
echo "Division: " . ($a / $b) . "<br>";
echo "Modulus: " . ($a % $b) . "<br>";
echo "Exponentiation: " . ($a ** $b);
?>

? Live Output / Explanation

The script performs arithmetic operations on two numbers ($a = 10 and $b = 3) and prints each result using echo.

? Interactive Understanding

Change the values of $a and $b and refresh the page to instantly see how different numbers affect each operation.

? Use Cases

Calculating totals, discounts, and taxes
Building calculators and billing systems
Handling scores, percentages, and analytics

✅ Tips & Best Practices

Use parentheses () to improve readability and ensure correct calculation.
Always validate inputs before performing division.
Remember that ** is available from PHP 5.6 onward.

? Try It Yourself

Create a file named arithmetic.php.
Define two variables and apply all arithmetic operators.
Display results using echo.
Experiment with negative and decimal values.